docs: def _get_playlist_abspath_from_data(self, stationFile=''):
          """ Get playlist absolute path
              Returns: playlist path, result
                Result is:
                  0  -  playlist found
                 -2  -  playlist not found
                 -3  -  negative number specified
                 -4  -  number not found
                 """
          ret = -1
          orig_input = stationFile
          if stationFile:
              if stationFile.endswith('.csv'):
                  """ relative or absolute path """
                  stationFile = path.abspath(stationFile)
              else:
                  """ try to find it in config dir """
                  stationFile += '.csv'
                  stationFile = path.join(self.stations_dir, stationFile)
              if path.exists(stationFile) and path.isfile(stationFile):
                  return stationFile, 0
          else:
              for p in [path.join(self.stations_dir, 'pyradio.csv'),
                        path.join(self.stations_dir, 'stations.csv'),
                        self.root_path]:
                  if path.exists(p) and path.isfile(p):
                      return p, 0
  
          if ret == -1:
              """ Check if playlist number was specified """
              if orig_input.replace('-', '').isdigit():
                  sel = int(orig_input) - 1
                  if sel == -1:
                      stationFile = path.join(self.stations_dir, 'stations.csv')
                      return stationFile, 0
                  elif sel < 0:
                      """ negative playlist number """
                      return '', -3
                  else:
                      n, f = self.read_playlists()
                      if sel <= n-1:
                          stationFile=self.playlists[sel][-1]
                          return stationFile, 0
                      else:
                          """ playlist number sel does not exit """
                          return '', -4
              else:
                  return '', -2